Spreadsheets created in Apple Numbers can be wondrous things, but opening them in Excel on a Windows PC is something of a headache. It can be done, though, with a little help from iCloud. In this ...

How to Open an XLS File in Excel. XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save ...